Thermo-Raman spectroscopy of selected layered double hydroxides of formula Cu6Al2(OH)16CO3 and Zn6Al2(OH)16CO3
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Description
Raman spectroscopy using a hot stage has been used to characterise layered double hydroxides (LDHs) of formula (Cu,Zn)6Al2(OH)16(CO3).4H2O. The spectra have been used to assess the molecular assembly of the cations in the LDH structure. The sharp band at 1058 cm-1 for the Zn6Al2(OH)16(CO3).4H2O is assigned to the ν1 CO32- symmetric stretching mode. The band shifts to higher wavenumbers and is observed at 1103 cm-1 at 600°C. It is proposed that metal carbonate species formed during the decomposition of the hydrotalcite structure is responsible for the increase in band position. The Cu-Al hydrotalcite did not show the same trend. The symmetric stretching mode of carbonate is observed at around 1110 cm-1, and at temperatures above 200 ºC a shoulder appears at around 1210 cm-1, suggested to be due to CuCO3.
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| ID Code: | 21243 | ||||
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| Item Type: | Contribution to Journal (Journal Article) | ||||
| Refereed: | Yes | ||||
| ORCID iD: |
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| Measurements or Duration: | 5 pages | ||||
| Keywords: | Dehydration, Dehydroxylation, Hot Stage, Hydrotalcite, Infrared Spectroscopy, Layered Double Hydroxide | ||||
| DOI: | 10.1002/jrs.2148 | ||||
| ISSN: | 0377-0486 | ||||
| Pure ID: | 31937532 | ||||
| Divisions: | Past > QUT Faculties & Divisions > Faculty of Science and Technology Past > QUT Faculties & Divisions > Science & Engineering Faculty Current > Research Centres > Australian Research Centre for Aerospace Automation |
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| Copyright Owner: | Consult author(s) regarding copyright matters | ||||
| Copyright Statement: | This work is covered by copyright. Unless the document is being made available under a Creative Commons Licence, you must assume that re-use is limited to personal use and that permission from the copyright owner must be obtained for all other uses. If the document is available under a Creative Commons License (or other specified license) then refer to the Licence for details of permitted re-use. It is a condition of access that users recognise and abide by the legal requirements associated with these rights. If you believe that this work infringes copyright please provide details by email to qut.copyright@qut.edu.au | ||||
| Deposited On: | 17 Jun 2009 05:31 | ||||
| Last Modified: | 14 Apr 2024 19:48 |
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